package think.thread.c03;

import java.util.concurrent.*;

class NeedsCleanup {
	private final int id;

	public NeedsCleanup(int ident) {
		id = ident;
		System.out.println("NeedsCleanup " + id);
	}

	public void cleanup() {
		System.out.println("Cleaning up " + id);
	}
}

class Blocked3 implements Runnable {
	private volatile double d = 0.0;

	public void run() {
		try {
			while (!Thread.interrupted()) {
				NeedsCleanup n1 = new NeedsCleanup(1);
				try {
					System.out.println("Sleeping");
					TimeUnit.SECONDS.sleep(1);
					NeedsCleanup n2 = new NeedsCleanup(2);
					try {
						System.out.println("Calculating");
						for (int i = 1; i < 2500000; i++)
							d = d + (Math.PI + Math.E) / d;
						System.out.println("Finished time-consuming operation");
					} finally {
						n2.cleanup();
					}
				} finally {
					n1.cleanup();
				}
			}
			System.out.println("Exiting via while() test");
		} catch (InterruptedException e) {
			System.out.println("Exiting via Interrupted Exception");
		}
	}
}

public class InterruptingIdiom {
	public static void main(String[] args) throws Exception {
//		Thread t = new Thread(new Blocked3());
//		t.start();
//		TimeUnit.MILLISECONDS.sleep(new Integer(1100));
//		t.interrupt();
		
		ExecutorService exec=Executors.newCachedThreadPool();
		exec.execute(new Blocked3());
		TimeUnit.MILLISECONDS.sleep(new Integer(1100));
		exec.shutdown();
		
	}
} 
